Composite-Wedge Anchorage for Fiber-Reinforced Polymer Tendons
Publication: Journal of Composites for Construction
Volume 26, Issue 2
Abstract
A novel composite-wedge anchorage is proposed here for prestressing fiber-reinforced polymer (FRP) tendons. The composite wedge was designed and optimized in terms of the length and elastic modulus of the wedge segments via finite-element analysis. The manufacturing technologies for the composite wedge involving a molding process, are presented in detail. Static, creep, and fatigue tests on basalt FRP (BFRP) tendons with the proposed anchorages were conducted. The tensile capacity, long-term deformation, and fatigue life of the tendon–anchor assemblies were analyzed. The experimental results show that the proposed anchorage exhibits an anchor efficiency factor of up to 91%; the corresponding value for a conventional steel–wedge anchorage is only 80%. The tendon–anchor assembly displays a creep behavior similar to that of BFRP tendons. Furthermore, the system survives 200 million cycles of fatigue load at a maximum fatigue load of 0.5 Fu (Fu is the tensile capacity of the tendon–anchor assembly) and a load range of 0.05 Fu. Wedge–sleeve and tendon–wedge sliding under a sustained load or cyclic load cannot cause considerable prestress loss in practical engineering. The results validate the effectiveness of the proposed anchorage under service loads and demonstrate the application prospects of this anchorage.
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Acknowledgments
The authors gratefully acknowledge the financial support provided by the Fundamental Research Funds for the Central Universities (Grant No. B200201074), China Postdoctoral Science Foundation (Grant No. 2021M690882), and Shuangchuang Doctor Program of Jiangsu Province, China (Grant No. JSSCBS20210253).
References
ACI (American Concrete Institute) Committee 440. 2011. Prestressing concrete structure with FRP tendons. ACI 440.4R-04 (Reapproved 2011). Farmington Hills, MI: ACI.
Al-Mayah, A., K. Soudki, and A. Plumtree. 2006. “Development and assessment of a new CFRP rod–anchor system for prestressed concrete.” Appl. Compos. Mater. 13 (5): 321–334. https://doi.org/10.1007/s10443-006-9019-6.
Alsheraida, O. S., and S. Elgamal. 2015. “Performance of modified wedge anchorage system for pre-stressed FRP bars.” In Vol. 2 of Int. Conf. on Construction Engineering & Management. Paris, France: The World Academy of Science, Engineering and Technology.
Au, F., and J. S. Du. 2008. “Deformability of concrete beams with unbonded FRP tendons.” Eng. Struct. 30 (12): 3764–3770. https://doi.org/10.1016/j.engstruct.2008.07.003.
Cabral-Fonseca, S., J. R. Correia, J. Custodio, H. M. Silva, A. M. Machado, and J. Sousa. 2018. “Durability of FRP-concrete bonded joints in structural rehabilitation: A review.” Int. J. Adhes. Adhes. 83: 153–167. https://doi.org/10.1016/j.ijadhadh.2018.02.014.
Cai, D., J. Yin, and R. Liu. 2015. “Experimental and analytical investigation into the stress performance of composite anchors for CFRP tendons.” Composites, Part B 79: 530–534. https://doi.org/10.1016/j.compositesb.2015.05.014.
Elrefai, A., J. S. West, and K. Soudki. 2007. “Performance of CFRP tendon–anchor assembly under fatigue loading.” Compos. Struct. 80 (3): 352–360. https://doi.org/10.1016/j.compstruct.2006.05.023.
El Refai, A. 2013. “Durability and fatigue of basalt fiber-reinforced polymer bars gripped with steel wedge anchors.” J. Compos. Constr. 17 (6): 04013006. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000417.
Feng, B., X. Wang, and Z. Wu. 2019. “Static and fatigue behavior of multitendon CFRP cables with integrated anchorages.” J. Compos. Constr. 23 (6): 04019051. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000982.
Harada, T., T. Idemitsu, M. Khin, et al. 2000. “Studies of anchorage method for continuous fiber reinforcing material using highly expansive material.” Concr. Lib. JSCE 627/V-44: 145–165.
Liang, Y., C. Sun, F. Ansari, et al. 2011. “Damage assessment and ductility evaluation of post tensioned beams with hybrid FRP tendons.” J. Compos. Constr. 15 (3): 274–283. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000166.
Mahal, M., B. Taljsten, and T. Blanksvard. 2016. “Experimental performance of RC beams strengthened with FRP materials under monotonic and fatigue loads.” Constr. Build. Mater. 122: 126–139. https://doi.org/10.1016/j.conbuildmat.2016.06.060.
Moaveni, S. 2021. Finite element analysis—Theory and application with ANSYS. 5th ed. Beijing: Publishing House of Electronics Industry.
Sayed-Ahmed, E. Y., and N. G. Shrive. 1998. “A new steel anchorage system for post-tensioning applications using carbon fibre reinforced plastic tendons.” Can. J. Civ. Eng. 25 (1): 113–127. https://doi.org/10.1139/cjce-25-1-113.
Shi, J., X. Wang, Z. Wu, and Z. Zhu. 2015a. “Creep behavior enhancement of a basalt fiber-reinforced polymer tendon.” Constr. Build. Mater. 94: 750–757. https://doi.org/10.1016/j.conbuildmat.2015.07.118.
Shi, J., X. Wang, Z. Wu, and Z. Zhu, et al. 2015b. “Effects of radial stress at anchor zone on tensile properties of basalt fiber-reinforced polymer tendons.” J. Reinf. Plast. Compos. 34 (23): 1937–1949. https://doi.org/ 10.1177/0731684415606857.
Shi, J., X. Wang, H. Huang, and Z. Wu. 2017. “Relaxation behavior of prestressing basalt fiber-reinforced polymer tendons considering anchorage slippage.” J. Compos. Mater. 51 (9): 1275–1284. https://doi.org/10.1177/0021998316673893.
Spadea, G., F. Bencardino, F. Sorrenti, and R. N. Swamy. 2015. “Structural effectiveness of FRP materials in strengthening RC beams.” Eng. Struct. 99: 631–641. https://doi.org/10.1016/j.engstruct.2015.05.021.
Taha, M. M. R., and N. G. Shrive. 2003a. “New concrete anchors for carbon fiber-reinforced polymer post-tensioning tendons—Part 1: State-of-the-art review/design.” ACI Struct. J. 100 (1): 86–95. https://doi.org/10.1070/QE2008v038n02ABEH013649.
Taha, M. M. R., and N. G. Shrive. 2003b. “New concrete anchors for carbon fiber-reinforced polymer post-tensioning tendons—Part 2: Development/experimental investigation.” ACI Struct. J. 100 (1): 96–104. https://doi.org/10.1070/QE2008v038n02ABEH013690.
Wang, X., P. Xu, Z. Wu, and J. Shi. 2015a. “A novel anchor method for multi-tendon FRP cable: Concept and FE study.” Compos. Struct. 120: 552–564. https://doi.org/10.1016/j.compstruct.2014.10.024.
Wang, X., P. Xu, Z. Wu, and J. Shi. 2015b. “A novel anchor method for multitendon FRP cable: Manufacturing and experimental study.” J. Compos. Constr. 19 (6): 04015010. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000563.
Wang, X., J. Shi, Z. Wu, and Z. Zhu. 2016. “Fatigue behavior of basalt fiber-reinforced polymer tendons for prestressing applications.” J. Compos. Constr. 20 (3): 04015079. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000649.
Wang, X., J. Zhou, L. Ding, J. Song, and Z. Wu. 2020. “Static behavior of circumferential stress-releasing anchor for large-capacity FRP cable.” J. Bridge Eng. 25 (1): 04019127. https://doi.org/10.1061/(ASCE)BE.1943-5592.0001504.
Wu, Z., X. Wang, X. Zhao, and M. Noori. 2014. “State-of-the-art review of FRP composites for major construction with high performance and longevity.” Int. J. Sustainable Mater. Struct. Syst. 1 (3): 201–231. https://doi.org/10.1504/IJSMSS.2014.062757.
Yang, D., J. Zhang, S. Song, et al. 2018. “Experimental investigation on the creep property of carbon fiber reinforced polymer tendons under high stress levels.” Materials 11 (11): 2273. https://doi.org/10.3390/ma11112273.
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© 2022 American Society of Civil Engineers.
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Received: Aug 31, 2021
Accepted: Nov 24, 2021
Published online: Jan 27, 2022
Published in print: Apr 1, 2022
Discussion open until: Jun 27, 2022
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